IBM CORPORATION
PS/2 MODEL 70 486/25
Processor |
80486DX |
Processor Speed |
25MHz |
Chip Set |
IBM |
Max. Onboard DRAM |
8MB |
Cache |
None |
BIOS |
IBM |
Dimensions |
355.6mm x 304.8mm |
I/O Options |
Serial port, parallel port, pointing device connector, proprietary hard/floppy drive controller slot, proprietary 16-bit MCA video adapter slot, VGA port |
NPU Options |
None |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
Battery/speaker |
J1 |
Keyboard |
J5 |
Serial port |
J2 |
Proprietary hard/floppy drive controller |
J6 |
Parallel port |
J3 |
Proprietary 16-bit MCA video adaptor |
J7 |
Pointing device |
J4 |
VGA port |
J8 |
DRAM CONFIGURATION | ||||
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
NONE |
2MB |
(1) 512K x 36 |
NONE |
NONE |
NONE |
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
4MB |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
NONE |
5MB |
(1) 256K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
6MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
6MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
7MB |
(1) 256K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
8MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
Notes:SIMMs are a proprietary IBM design, standard 36-bit SIMMs can not be used. Onboard memory does not need to be totally populated in order to use memory expansion cards. |